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- - fuel psi question (https://blazerforum.com/forum/engine-transmission-35/fuel-psi-question-18321/)

Fast89z28

03-13-2008 07:30 PM

fuel psi question

1998 4.3 i have been checking the fuel psi every other day and its on the leak down test over night tonight. its now 54 psi acording to my actron 0-100 guage and running this time it fuctuates big time from 54 to 40. i just bought the guage tonight my buddies didnt fluctuate when i was checking it before. i purged the fuel numorus times no air. i am shure its going to need a pump,to cure the high rpm break-up?

swartlkk

03-13-2008 08:29 PM

RE: fuel psi question

Yeah, 40psi is not good.

Fast89z28

03-13-2008 08:48 PM

RE: fuel psi question

do the fuel presure guage usally bounce like crazy the other one i used didnt seem to do this?

garry2000blazer

03-14-2008 11:10 AM

RE: fuel psi question

Unless your pressure is jumping around like crazy, the other gauge you used was probably oil filled which dampens the movement of the needle.

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